The document discusses radio configuration assessment and planning for both a Broadband Radio (BR) system and a Base Station Subsystem (BSS). It provides examples of configuration settings for signaling allocation, traffic channel allocation, and packet switched capacity for a cell with either 8 or 10 TRXs. Key parameters for both the BR and BSS configurations are also defined.

1. Soc Classification level
Presentation / Author / Date1 © Nokia Siemens Networks
BR radio configuration assessment and
BSS radio configuration planning

2. Soc Classification level
2 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Example (1 cell with 8TRXs)
• Signalling allocation
– CCCH is removed (not available in BSS)
– TCHSD is removed (not available in BSS)
– SDCCH capacity is the same (dynamic SDCCH on BSS?)
– BCCH is not on the same TRX (frequency channel?)
• TCH allocation
– Rule of TCHD allocation
• TRXMD and GTRX
– PS on non-BCCH on both system, but the setup is different (see next slide)
• Too many SDCCH TSLs are allocated statically (dynamic SDCCH?)
BR TRXMD
Gemini GTRX
GSWUXI3
TSL0 TSL1 TSL2 TSL3 TSL4 TSL5 TSL6 TSL7
BR setup TRX0 MBCCH SDCCH CCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-017 SDCCH TCHFR TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX1 SDCCH TCHF_HLF TCHF_HLF TCHSD TCHSD TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-018 SDCCH TCHD TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX2 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF EDGE
BSS TRX-019 SDCCH TCHF TCHF TCHF TCHF TCHF TCHF TCHF y
BR setup TRX3 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-020 SDCCH TCHD TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX4 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-021 SDCCH TCHF TCHF TCHF TCHF TCHF TCHF TCHF y
BR setup TRX5 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-022 SDCCH TCHF TCHF TCHF TCHF TCHF TCHF TCHF y
BR setup TRX6 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-023 MBCCH SDCCH TCHF TCHF TCHF TCHF TCHF TCHF n
BR setup TRX7 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-024 SDCCH TCHD TCHD TCHD TCHD TCHD TCHD TCHD n

3. Soc Classification level
3 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Example (1 cell with 8TRXs)
• Signalling and voice capacity on air interface
BR BSS
CCCH 1 -
SDDCH/8 9 8
TCHSD/8 2 -
SDCCH total: 11 8
TCH_HFR 52 -
TCHF - 24
TCHD - 27
CS total (FR+HR): 108 78

4. Soc Classification level
4 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Example (1 cell with 8TRXs)
Layer preferation:
The TRXs are treated on the same level both for CS and PS.
(E)GPRS enabling:
All the TRXs are GPRS and EGPRS enabled, but TRXMD and GTRX is the limiting setup.
(E)GPRS territory:
The offered capacity is not the same on BR and BSS:
LAYERID LAYERID CRTSWSPELLPRM GLLPRM ELLPRM
LY_00 LY_00 LY_00 LY_00 LY_00
BFG TRP
0 0
BR
BSS
EGPRS EEDGE
TRUE TRUE
GENA EGENA
y y
BR
BSS
GMANPRESPRM EMANPRESPRM GPDPDTCHA
3 2 22
CMAX CDEF CDED
100 29% (6RTSL) 20% (4RTSL)
BR
BSS
BR: (5+7+7+7+7+7+7+7-3-2)*0.22=10 TSL
10+3+2=15 -> 15 TSLs can be used for PS in BR
13 for GPRS
7 for EGPRS
BSS: 7*3=21 -> 21 TSLs can be used for PS in BSS (both for GPRS and EGPRS)

5. Soc Classification level
5 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Example (1 segment with 10 TRXs)
• Signalling allocation
– CCCH is removed (not available in BSS)
– TCHSD is removed (not available in BSS)
– SDCCH capacity is the same (dynamic SDCCH on BSS?)
– BCCH is not on the same TRX (frequency channel?)
• TCH allocation
– Rule of TCHD allocation
• TRXMD and GTRX
– PS on non-BCCH on both system, but the setup is different (see next slide)
BR TRXMD
Gemini GTRX
GSANYUAN2
TSL0 TSL1 TSL2 TSL3 TSL4 TSL5 TSL6 TSL7
BR setup TRX0 MBCCH SDCCH CCCH SDCCH CCCH SDCCH TCHF_HLF TCHF_HLF GSM
BSS TRX-009 SDCCH TCHF TCHF TCHD TCHD TCHD TCHD TCHD n
BR setup TRX1 SDCCH TCHF_HLF TCHF_HLF TCHSD TCHSD TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-010 SDCCH TCHF TCHF TCHF TCHF TCHF TCHF TCHF y
BR setup TRX2 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF EDGE
BSS TRX-011 SDCCH SDCCH TCHF TCHF TCHF TCHF TCHF TCHF y
BR setup TRX3 SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-012 MBCCH SDCCH SDCCH TCHF TCHF TCHF TCHF TCHF n
BR setup TRX4 SDCCH SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-013 SDCCH SDCCH TCHF TCHF TCHF TCHF TCHF TCHF y
BR setup TRX5 SDCCH SDCCH SDCCH SDCCH TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-014 SDCCH SDCCH TCHF TCHF TCHF TCHF TCHF TCHF y
GSANYUAN2E
BR setup TRX6 TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-015 TCHD TCHD TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX7 TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-016 TCHD TCHD TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX8 TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-017 TCHD TCHD TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX9 TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-018 TCHD TCHD TCHD TCHD TCHD TCHD TCHD TCHD n
BR setup TRX10 TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF TCHF_HLF GSM
BSS TRX-019 TCHD TCHD TCHD TCHD TCHD TCHD TCHD TCHD n

6. Soc Classification level
6 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Example (1 segment with 10 TRXs)
• Signalling and voice capacity on air interface
BR BSS
CCCH 2 -
SDDCH/8 12 10
TCHSD/8 2 -
SDCCH total: 14 10
TCH_HFR 71 -
TCHF - 28
TCHD - 45
CS total (FR+HR): 144 118

7. Soc Classification level
7 © Nokia Siemens Networks
Upper limit for free FR TCHs
- btsSpLoadDepTCHRate BTS
level
- btsLoadDepTChRate BSC
level
Lower limit for free FR TCHs
- btsSpLoadDepTCHRate BTS
level
- btsLoadDepTChRate BSC
level
Allocatio
n of FR
TCHs
Allocatio
n of HR
TCHs
Allocatio
n of FR
TCHs
• Free FR TCHs
based on ratio of
available to working
FR TCHs
• Process is
disabled by setting
lower limit > upper
limit
• Enabling load
analysis at BTS
level automatically
disables it at a BSC
level
• To disable at BTS
level must be
disabled at both
BTS and BSC level
BR Configuration assessment and BSS planning
HR - TCH Allocation based on Cell Load
FRU: 20, 40, 100...
FRL: 0, 20, 30...

8. Soc Classification level
8 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Example (1 segment with 10 TRXs)
Layer preferation:
The TRXs are treated on the same level both for CS and PS.
(E)GPRS enabling:
Some of the TRXs are GPRS enabled only, but TRXMD and GTRX is the limiting factor.
(E)GPRS territory:
The offered capacity is not the same on BR and BSS:
BR: (2+7+7+7+6+4+8+8+8+8+8-3-2)*0,12= 8TSL
8+3+2=13 -> 13 TSLs can be used for PS in BR
11 for GPRS
6 for EGPRS
BSS: 7*2+6*2=25 -> 25 TSLs can be used for PS in BSS (both for GPRS and EGPRS)
EGPRS EEDGE
TRUE TRUE
GENA EGENA
y y
y n
BTS2
BR
BSS BTS1
GMANPRESPRM EMANPRESPRM GPDPDTCHA
3 2 12
CMAX CDEF CDED
100 24% (6RTSL) 16% (4RTSL)
BR
BSS
LAYERID LAYERID CRTSWSPELLPRM GLLPRM ELLPRM
LY_00 LY_00 LY_00 LY_00 LY_00
BFG TRP
0 0
BR
BSS

9. Soc Classification level
9 © Nokia Siemens Networks
BR configuration assessment and BSS planning
Parameters
• BR
– LAYERID= LY_xx
 Service Layer ID, this parameter is used for the feature 'Service Dependent Channel Allocation' and defines the
service layer this TRX belongs to.
– CRTSWSPELLPRM= LY_xx
 Circuit switched speech layer list primary, this parameter defines list of TRX layers assigned to circuit switched
speech call applying EFR-FR-HR codec in a single band standard cell, or in the complete/far area of a dual area
cell (extended, concentric single/dual band), or in the BCCH band of a dual band standard cell. The service layers
of the SLL are defined in a decreasing priority order, i.e. the entered sequence of layer-IDs determines the layer
preference for the resource allocation for this service.
– GLLPRM=LY_xx
 GPRS layer list primary, this parameter defines list of TRX layers assigned to GPRS service in a single band
standard cell, or in the complete/far area of a dual area cell (extended, concentric single/dual band), or in the BCCH
band of a dual band standard cell. The service layers of the SLL are defined in a decreasing priority order, i.e. the
entered sequence of layer-IDs determines the layer preference for the resource allocation for this service.
– ELLPRM= LY_xx
 EDGE layer list primary, this parameter defines list of TRX layers assigned to EDGE service in a single band
standard cell, or in the complete/far area of a dual area cell (extended, concentric single/dual band), or in the BCCH
band of a dual band standard cell. The service layers of the SLL are defined in a decreasing priority order, i.e. the
entered sequence of layer-IDs determines the layer preference for the resource allocation for this service.
• BSS
– TRP
 With this parameter you define whether the BCCH TRX or other TRXs (of the regular frequency area) are preferred
in traffic channel allocation.
– BFG
 With this parameter you define whether the BCCH TRX or other TRXs are preferred in GPRS channel allocation.

10. Soc Classification level
10 © Nokia Siemens Networks
BR configuration assessment and BSS planning
Parameters
• BR
– TRXMD=GSM
 TRX Mode, this parameter indicates the capability of the TRX to support EDGE. This parameter can only be set to the value EDGE, if the
TRX-HW which is associated to the created TRX object an EDGE CU (ECU).
• Carrier Unit (CU, first model, introduced in the early 1990)
• GPRS Carrier Unit (G-CU)
• EDGE Carrier Unit (E-CU)
• Flexible Carrier Unit (FlexCU)
– EGPRS=TRUE
 Enable GPRS, this parameter allows to enable/disable GPRS on a per cell basis. As this parameter can only be set to TRUE, if at least one
of the TRXs in the cell supports GPRS (this is the case if the TRX is defined as belonging to a service layer which is included in the SLL for
GPRS services - please see command SET BTS [SERVICE] for further explanations).
– EEDGE=TRUE
 Enable EDGE, this parameter allows to enable/disable EGPRS (EDGE GPRS) on a per cell basis. As this parameter can only be set to
TRUE, if at least one of the TRXs in the cell support EDGE (see parameter TRXMD in command CREATE TRX).
– GPDPDTCHA=100
 GPRS Percentage of dynamic PDTCH Available, this parameter indicates the percentage of available 'shared' traffic channels that may be
used for GPRS traffic. 'Shared traffic channels' are those channels (TCHFULL, TCHF_HLF, TCHSD in TCHPOOL) for which the parameter
GDCH is set to <NULL> (see CREATE CHAN for TCH) and for which the superordinate TRX is in service and available for (E)GPRS service
• BSS
– GTRX
 With this parameter you define whether the GPRS, EGPRS, or Extended Cell for GPRS/EDGE capability is enabled for the current TRX.
– GENA
 With this parameter you define whether the GPRS capability is enabled in the cell.
– EGENA
 Attribute enables or disables EGPRS on BTS level. All GPRS-enabled TRXs of the BTS have to be EDGE capable. The GPRS must be
enabled in the segment in order to enable EGPRS in the BTS.
– CMAX
 Attribute defines the maximum number of timeslots in the PS territory. Timeslot that belongs to a PS territory can be configured to PS use or
DTM-CS use.

11. Soc Classification level
11 © Nokia Siemens Networks
BR configuration assessment and BSS planning
Parameters
• BR
– GMANPRESPRM
 GPRS maximum Number of PDCH reserved Primary, this parameter defines the number of traffic channels
reserved for GPRS in the 'Primary Area'.
– EMANPRESPRM
 EGPRS maximum Number of PDCH reserved Primary, this parameter defines the number of traffic channels
reserved for EGPRS in the 'Primary Area'.
• BSS
– CDEF
 With this parameter you determine the default GPRS territory size in a cell. The channels in the default GPRS
territory are used primarily for packet switched traffic. However, if the circuit switched territory becomes congested,
the BSC can allocate a traffic channel in the default GPRS territory for circuit switched use.
– CDED
 With this parameter you determine the amount of PSW-only channels in a cell. The value of the dedicated GPRS
capacity parameter must be smaller than or equal to the value of the default GPRS capacity parameter.

12. Soc Classification level
12 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Channel types
BR Parameter BSS Parameter
CHTYPE
object: CHAN
range: 1 (TCHFULL), 2(SDCCH), 3(MAINBCCH),
4(MBCCHC), 5(CCCH), 6 (SCBCH), 7(BCBCH),
8(TCHF_HLF), 9 (TCHSD)
no default
This parameter - defines the logical channel
combination mapped onto the physical channel
(timeslot).
channel<n>Type (n: number of TSLS 0..7)
object: TRX
Range: TCHF (0), TCHH (1), TCHD (2), SDCCH (3), MBCCH (4), MBCCHC
(5), MBCCB (7), Not allowed in CH0 (8), Not In Use (9), ERACH (10),
Not allowed in CH0 (13), EGTCH (14), Not allowed in CH0 (15)
default: TCHF (0)
With this parameter you define the logical channel combination that has to
be mapped onto the basic physical channel.
BR parameters mapped to BSS:

13. Soc Classification level
13 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Channel types - TCH
• FR, HR, EFR, AMR FR and AMR HR, WB AMR (GMSK codecs; without
quality based homing) are supported
• If NB-AMR or WB-AMR conditions are met like in S14 BSC3i SW then a
speech call with AMR HR/FR or WB-AMR FR codec is established
according to wideband AMR and AMR TFO
– In BSS WB-AMR capability of TRX is indicated by existing TRX-specific
parameter “BB Unit Supports EDGE” (bbUnitSupportsEdge)
• In GEMINI WB-AMR capability of BTSplus TRX is indicated by existing
BBS TRX-specific parameter “BB Unit Supports EDGE” which is mapped
from TRXMD

14. Soc Classification level
14 © Nokia Siemens Networks
BR Configuration assessment and BSS planning
Channel types (Dynamic SDCCH)
• No need to configure TCHSD channels anymore
• Static planning (according to the maximum SDCCH and TCH needs) has
to be done so saving total required number of channels
• The configured TCH and SDCCH channels may be reconfigured
dynamically by BSC according the actual traffic needs
• BSS “Dynamic SDCCH" is a feature in which timeslots are configured to
work either as TCH/FR or SDCCH.
• The feature is available on both BR and BSS system
• In GEMINI BSS Dynamic SDCCH feature replaces BR Smooth Channel
Modification feature
• The number of timeslots configured as Dynamic SDCCH plus the one
SDCCH pure is however limited up to four due to memory and CPU load
limitations in both BR and BSS